feat(coding-agent): added auto-rebase for stale atom/hashline anchors

- Added auto-rebasing for stale atom and hashline anchors within ±2 lines, with warning diagnostics.
- Removed atom range-locator support and dropped `between` ops, updating docs/tests for `sub` over `set` nudges.
- Changed no-op handling to track unchanged hashline edits and emit contextual hints for unchanged ranges.
- Expanded Anthropic strict error handling to retry on schema-too-complex and compiled-grammar-too-large errors.
- Added anchor-retargeting warning checks and updated edit tests to expect locator and range-locator rejections.
- Updated python tool-call fixtures by adding `title` to executed-cell payloads and adjusting related test expectations.

packages/coding-agent/test/tools/python-execution.test.ts

@@ -48,7 +48,7 @@ describe("python tool execution", () => {
 		const tool = new PythonTool(createSession(tempDir.path(), kernelOwnerId));
 		const result = await tool.execute(
 			"call-id",
-			{ cells: [{ code: "print('hi')" }], timeout: 5, cwd: tempDir.path(), reset: true },
+			{ cells: [{ title: "hello-world", code: "print('hi')" }], timeout: 5, reset: true },
 			undefined,
 			undefined,
 			undefined,